With the recent arrivals of its latest 911, Boxster, and Cayman, Porsche kept a relatively low profile at the 2013 Detroit auto show, physically debuting the Cayenne Turbo S, a model which it announced way back in October. Over in Weissach, Germany, though, engineers are already working on the next-generation of German sports cars. We cornered Wolfgang Hatz, head of research and development, to quiz him on the upcoming $845,000 918 Spyder, a 911 hybrid, and four-cylinder Porsches. Oh, and we just had to ask for Hatz’s opinion on this year’s show-stopper, the 2014 Chevrolet Corvette Stingray.